Sonic the Hedgehog

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Sonic the Hedgehog
Sonic The Hedgehog Title.PNG
Company Sega
Header Yes
Bank {{{bank}}}
Interleaved {{{interleaved}}}
Type {{{type}}}
ROM 512 Kilobyte/4 Megabit
Country JUE
ROM Speed {{{romspeed}}}
Video NTSC
Checksum 264A
ROM map | RAM map | Text table | Notes | Tutorials


SonED2 is the primary Sonic the Hedgehog editor, working with Sonic 1 and Sonic 2; however, it requires that the game be prepared to produce a "split disassembly", where the level art, level layouts, object definitions etc. are split from the actual assembly code into separate data files. Work now goes into commenting the code such that it can be worked on.

The current most popular split disassembly for Sonic 1 is maintained by Hivebrain and uses SNASM68K for assembly. It (as well as SonED2 itself) can be downloaded from Hacking CulT (below).

Known Dumps

  • Sonic The Hedgehog (W) (REV00) [!]
  • Sonic The Hedgehog (W) (REV01) [!]
  • Sonic The Hedgehog (W) (REVXB)
  • Sonic The Hedgehog (MP)
  • Sonic The Hedgehog (W) (REV00) [t1]

External Links

  • Sonic the Hedgehog hacks at
  • S2B A site devoted to research on Sonic 2 Beta. It merged with Sonic Retro back in 2006.
  • Sonicology Contains many useful Sonic ROM hacking guides.
  • Sonic Stuff Research Group Has a Sonic hack archive, and will host your hack! Link Updated.
  • RetroHack A growing community of Hackers, mainly based on Sonic Hacks, but all other hacks are welcome! This website has been built into the Forums, for easy content management, which means the Whole Site is skinnable.
  • Hacking CulT A popular site for Sonic hacks.
  • Sonic CulT A Sonic fansite.
  • Sonic Stadium Rom Hacking Forum This site has a lot of members that post information, screenshots, and downloads for their Sonic hacks. There are some great Sonic hacks posted here, but unfortunately most of the hacks here are unfinished and of low quality.
  • Sonic retro This site has a lot of information on Rom hacks for Sega Genesis Sonic games. Hacks can be downloaded from this site, and the Forum has information regarding updated to many of these hacks. This site seems to host higher quality and more complete Sonic hacks than other sites.